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diff --git a/Source/JavaScriptCore/b3/B3InsertionSet.h b/Source/JavaScriptCore/b3/B3InsertionSet.h
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+/*
+ * Copyright (C) 2015-2016 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ */
+
+#pragma once
+
+#if ENABLE(B3_JIT)
+
+#include "B3Origin.h"
+#include "B3Type.h"
+#include "B3TypeMap.h"
+#include <wtf/Insertion.h>
+#include <wtf/Vector.h>
+
+namespace JSC { namespace B3 {
+
+class BasicBlock;
+class Procedure;
+class Value;
+
+typedef WTF::Insertion<Value*> Insertion;
+
+class InsertionSet {
+public:
+    InsertionSet(Procedure& procedure)
+        : m_procedure(procedure)
+    {
+    }
+
+    bool isEmpty() const { return m_insertions.isEmpty(); }
+
+    Procedure& code() { return m_procedure; }
+
+    void appendInsertion(const Insertion& insertion)
+    {
+        m_insertions.append(insertion);
+    }
+
+    Value* insertValue(size_t index, Value* value)
+    {
+        appendInsertion(Insertion(index, value));
+        return value;
+    }
+
+    template<typename ValueType, typename... Arguments>
+    ValueType* insert(size_t index, Arguments... arguments);
+
+    Value* insertIntConstant(size_t index, Origin, Type, int64_t value);
+    Value* insertIntConstant(size_t index, Value* likeValue, int64_t value);
+
+    Value* insertBottom(size_t index, Origin, Type);
+    Value* insertBottom(size_t index, Value*);
+
+    void execute(BasicBlock*);
+
+private:
+    Procedure& m_procedure;
+    Vector<Insertion, 8> m_insertions;
+
+    TypeMap<Value*> m_bottomForType;
+};
+
+} } // namespace JSC::B3
+
+#endif // ENABLE(B3_JIT)